IntroductionThree-dimensional composite drainage network is one three-dimension geonet composited two needle-punched non-woven geotextiles. one 3Dgeonet +two geotextilesOffering completely functions "filter-drainage-protection". This kind of special three-dimensional structure can make it bear higher compression loading and keep certain thickness and same time offer excellent permeable performance.

Performance1. Excellent drainage and sustain high compression loading2. Highest tensile strength and shearing strength3. Cut down ratio of geotextile into geonet and keep stable permeability in a long time4. It can bear compression loading over 2000Kpa5. Its compressive strength far exceeds general drainage geonet